DE2734525A1 - Plasticised PVC sealing web to prevent water seepage from canal beds - are clamped between metal bars to connect firmly with lining of waterway - Google Patents

Abstract

Plastics sealing web is made e.g. of plasticised PVC and is opt. provided with ribs on both sides. It is used in building and civil engineering, e.g. in construction of ship canals for sealing the canal bed against water leaking or seeping away, esp. if the waterway is above the level of the surrounding countryside so that the water exerts increased hydrostatic pressure upon the bottom and banks of the canal. A connecting strip of the web is clamped between metal strips or between a metal strip and the surface of the bed of the waterway. It is used to provide permanent and reliable leak-proof sealing connection of the lining of the canal, e.g. bitumen or plastics webs, with the underlying earthwork or structure. It will accommodate itself to and take up, any movement of concrete or similar base both when the latter contracts e.g. at low temp. and when settling normally.

Description

Manual fastening of plastic geomembranes

a building The subject matter of the invention is concerned with a Manual fastening of sealing sheets made of plastic, for example made of soft P \ TC and optionally with ribs on both sides on a structure and a process for the production of a building waterproofing with such an edge fastening of plastic sealing sheeting, wherein the plastic sealing sheets are connected to one another in a watertight manner.

In the production of waterproofing from bituminous materials or from plastics prepares the connection of the waterproofing membrane, especially when it is pressing Water from inside, on structures, for example made of reinforced concrete, difficulties, engineering structures in connection with earthworks such as shipping canals that overlook the surrounding Lying on land and crossing roads, railways or watercourses also have such connection problems.

It is well known that the waterways are chi uted by multilayered asphalt sealed against seepage of water. The necessary transfers over the roads etc. represent a break in the continuity of the waterproofing layers. As a result of the contraction of the concrete and the asphalt seals due to the cold, the latter also as a result of cooling after the (up to 190 ° C) high temperature during manufacture, as well as due to subsidence of the earthworks, e.g. if it is not sufficiently solidified Floor next to the artificial structure or the like, there is a risk that the joints on the contact surfaces the concrete and the seal can tear and the sewer water penetrate under pressure and cause great harm.

Structural measures in the form of stepped execution are known the connection surfaces of concrete structures in such a way that the asphalt seal is stepped placed on the structure in individual layers. In this way the water pressure exploited, which presses the horizontal support surfaces apart.

The vertical butt joints are made after the asphalt mass has cooled down potted with special biturns. However, the functioning of this measure requires that no concreting errors e.g.

Gravel pockets on the top or in the immediate vicinity of the surfaces are present and that the casting compounds do not become brittle or washed out over time or loosen them from the adhesive surfaces.

Metal foils of 0.1 or 0.2 mm thickness are also known, e.g.

Copper rifle tapes that are placed between bitumen adhesives, e.g. Mastixl laid and pressed onto the structure by means of rigid metal profiles using bolts will. The metal foils are generally 60 mm wide and have an overlap of 10 cm and gluing transversely to the connection and in the required lengths between two asphalt layers integrated in the seal.

The gluing of the metal roll strips in the longitudinal direction takes place with Special adhesives based on bitumen, i.e. not homogeneous.

The prerequisite for the watertightness of such metal foils is that the plasticity of the bitumen is retained, which is due to the rheological Behavior of bitumen at low temperatures is not to be expected.

With plastic adjusted bitumen masses to improve the cold behavior is a decrease in the pressing in the area of the pressed iron profiles and thus In the course of time it becomes watery, with a harder consistency it becomes peeled off when it is cold of the adhesive film to be expected from the metal straps.

The use of so-called drag plates is also known Structural steel sheets in greater thickness. They are also engineered using steel bolts and rigid iron profiles on the concrete structures (e.g. 1930 on the Mittelland Canal) attached.

The autogenous welding of the individual metal sheets to one another as well as the inevitable rust on the surfaces, make it more difficult for sure the water circulation with this type of connection. However, these connections are at Soil settlements in the edge area of an earthwork structure are unable to prevent the dots occurring To participate in movements and significant deformations. finely pulling out the sheets from the embedding between the asphalt layers is possible and expected. The same applies to the use of copper corrugated tapes for subsidence and Ground movements in the edge area of concrete structures, where the required compaction of the soil is only possible up to a certain distance from the building and subsidence are to be expected.

The invention is based on the problem of being watertight and non-positive Connections of plastic sealing sheets to buildings, in particular concrete buildings to enable.

For this purpose, it is provided according to the invention that a connection strip the sealing membrane between metal rails or between a metal rail and the building surface is clamped. With simple d, h. unreinforced edges of waterproofing would be due to the low modulus of elasticity and the elasticity of the Material, e.g. soft FVC when subjected to tensile forces, e.g.

The lowering of the floor by the elongation of the material inevitably leads to a reduction of the cross-section, whereby a reduction of the indentation takes place and it can be pulled out of the metal rails. In another episode this protection are the through holes for the fastening bolts or Screws required penetrations of the seal with concentrated forces so loaded that there is a fear of tearing out the sealing material, therefore is proposed in a development of the invention that the connector strip on the to be connected to the edge of the building a reinforcement in the form of an adhesive applied reinforcement tape in a wider cut than the clamping surfaces of the Has metal rails and along the outer edge with a further thickening is designed in the manner of a welt.

Through this ventilation in the connection area and the thickening the dangers described above for a non-positive or watertight Connecting geomembranes to structures is avoided, the loss of cross-section is avoided multiply con] pensated by the reinforcing band and by the thickening on the outside Edge in the manner of a leather, uneven tensile forces are evenly distributed. At the same time, the connection strip is anchored by the thickening behind the metal rails.

According to a further proposal of the invention, the piping can by solid Applying a tape along the edge of the connector strip be formed. Ine further training of the piping can, however, also be done in such a way that the Piping by turning over the edge of the connection strip and inserting a round wire is made in the loop thus formed.

The piping is made by turning the edge and inserting a flundwheel produced, so can the returning surfaces of the envelope and the connector strip be welded together homogeneously and thus a force-transmitting overlap the welding point by a V-shaped final state produced by an oblique joint Butt seam can be achieved.

According to a further variation it is provided that the connection strip One or more band-like reinforcements offset against one another on one or both sides having. Such a connection strip is particularly advantageous to use, if it is still to be concreted into the concrete structure during the manufacture of the same can and in this way enables a firm anchoring.

For the production of homogeneous connections that are also watertight and have mechanical properties that are as equivalent as possible to the geomembranes, the invention provides that the reinforcement tape and that used for the piping Parts are made of the same material as the plastic sealing sheeting used or the connecting stripes.

Here it is possible to use the connection strip in its totality, for example to extrude as a whole or also to be prefabricated from individual parts, whereby also the individual parts can still be assembled on site. Essential it is here that the butt-butted seams of the abutting connection strips and the butting reinforcement tapes and the butting den The bands forming the piping are offset from one another.

If there is a further increase in the mechanical rigidity of the connection strip is required, is a unilateral according to a further proposal of the invention laminated with plastic film, it uses sheet metal, the one with external plastic film is bent and slightly folded at the bent edge forming a loop is executed.

Such a connection strip is particularly suitable for Subsequent attachment of sealing membranes in their edge areas to completed ones Concrete structures.

The procedures for the production of a building waterproofing with an edge fastening of plastic sealing sheets with connecting strips according to the invention can either be provided in such a way that the connection strip by means of the metal rail is clamped and attached to the structure by means of bolts or the like, wherein Plastic sealing material inserted between the connection strips and the building surface is, then the sealing membranes connected to the connection strip in a watertight manner be, or that the connecting strip when concreting the structure between the Formwork is inserted and concreted in, then the sealing membrane is attached the connection strips can be connected in a watertight manner.

In the case of existing structures, the connection strips are therefore with piping and reinforcement with rigid metal rails or metal profiles and Screws to the structure or

watertight onto a first metal profile already concreted in the building pressed on.

An advantage of the invention is to be seen in the fact that plastic sealing sheets can be connected to rigid concrete structures and in doing so for a long time Diohtffekt is given.

The associated safety has a particular effect on earthworks, such as shipping canals, retention basins, pumped storage basins etc. are advantageous because there is always a transition from earthworks to artifacts and so that the problematic connections can be dealt with. As especially with earthworks strong subsidence of the earthworks in operation must be expected here elastic and resilient resp.

Stretchable plastic sealing sheets such as or made of soft PVC are well suited. The edge fastening proposed according to the invention enables these to be connected elastic sealing sheeting to the rigid concrete structures and guarantees at the same time maintaining the benefits of elastic geomembranes in use.

Further advantages of the invention are the homogeneity of the seal from the waterproofing membranes to the edge connection to the concrete structure, in the Independence of the manufacturing width of the individual sealing sheets or connection strips, their dimensioning is based exclusively on the structural conditions can be. The uniform thickness of the connection strips also in the joint areas enables a completely uniform edge connection running all around. The weakened The butt welds are welded by the staggered butt welds and piping reinforcements bridged and by the reinforcement of the connecting strip in the pressing area the weakening of the material is due to the through holes Compensated for the fastening bolts in the event of tensile stress in the transverse direction. Advantageous is also the thickening of the clamped connection strip on the tension facing away from the piping, which is due to a reduction in cross-section Tensile action the sliding out or tearing of the connector strip from the passage holes in the bolts or out of the metal rails. ~ ~ ~ About that In addition, the edge fastening proposed according to the invention does not have any bituminous properties Adhesive compounds are used, so that no Flow as is to be expected when using bitumen.

The invention is shown in the drawing according to exemplary embodiments and is explained in more detail below on the basis of this.

They show: FIGS. 1 a and 1 b an edge fastening with connection strips with reinforcement tape and piping in cross section and in plan view Fig. 2a and 2b one Terminal strips with a loop in cross section and a plan view Fig. 3a and 3b concreted connection strips in cross section and in plan view Fig. 4a to 4c a Connection strips with folienkaschj.ertem sheet metal in cross section in different Installation on a concrete structure and in a supervision.

5 shows a further foil-laminated connection strip in cross section In the case of existing concrete structures, the connecting strips 1 are made rigid Metal rails and screws, such as flat iron strips and cast-in studs watertight to the structure or to a second flat iron rail embedded in concrete pressed on, as shown in FIGS. 1 and 2 or, as a modification, in FIG is.

Figus la shows in cross section the connection strip 1, the compensation the weakening of the material cross-section as a result of the required holes 2 for the screws 11 by a band 3 made of the same material as the connecting strips and in one slightly larger width than that for the clamping Reserved flat iron rail 4 through homogeneous removal, see weld seam 5, is reinforced. For the connection strip and the reinforcement tape, is preferred Soft PVC film used.

At the outer edge of the connection strip 1 is the additional thickening 7 as a piping in the form of a tape 7 made of plastic, preferably also "calibrated" P7C , provided that is not detected by the flat iron rail 4 zurn pressing, but protrudes beyond this and is preferably also closer. This piping 7 prevents the pulling out of the connection strip 1 from the flat iron rail 4 and causes in the case of tensile stress across the connection, that the connection strip with sealing Effect along the side edge of the flat iron rail. The exit strip 1 is not placed directly on the rough concrete surface 8 of the concrete structure 24, Instead, sealing materials 9, e.g. Silicone rubber or the like, used as one-component or two-component materials, to compensate for this are carried out and then seal after setting. On these sealing materials 9, the connection strip 1 is applied and then by means of the screws 11 over the flat iron rail 4 attached to the substrate in a watertight clamping manner. As a block against possible

seeping in capillary water from the upper edges, change the connection strip here and at bolt holes 2, these are also sealed in this area with a sealing material, or sealed in the form of the putty fold lo.

The advantage of the construction proposed according to FIG. La lies on the one hand in the possible large installation length of the connection strip without butt joints, E.g. 20 m or more are feasible and only then is a longitudinal joint necessary. In addition, the longitudinal joints can be in the individual layers in the case of greater lengths of the connecting strip, the reinforcing strip and the sweeping tape offset from one another be arranged so that the inevitable weakening of the butt joint Seams of the individual layers through the overlying layer - the next one Band be bridged. These staggered butt welded seams are particular from the top view according to figure whether to see the connection strip 1, the butt-welded Butt seam 12, the reinforcement band 3 is welded on over the entire surface, which is butt-welded at the butt seam 15 offset to the butt seam i2, and at the outer one The edge is the edging strip 7, likewise with an offset butt-welded joint 14 full surface adhesive e.g.

welded onto the reinforcement band 3. Here are too the through holes 2 for the screws 11 can be seen.

At the other free edge of the connecting strip 1 can then Sealing sheets 20a are connected by overlap welding.

Figure 2 shows a further variant of the connection strip 1, wherein at the same time in the concrete structure 25 another flat iron rail serving as a counter bearing 6 is provided in concrete.

The connection strip 1 according to FIG. 2 is folded over at its free end 3a, so that the end 3a forms the reinforcement of the connecting strip and is turned over in this In the area, the two are connected to one another over the entire surface by welding 5.

In the loop area, the run t 16 is inserted, e.g. made of rigid PVC, so that in this way a reinforced end is formed as a piping. Also this one The connecting strip is then e.g. attached to the concrete structure 25, also sealing compound 9 and lo opposite de building are provided. With such a design of the connecting strip 1 is preferred to extend the connector strip in the longitudinal direction with a Butt joint seam is not provided at right angles, but the butt seam is provided at an acute angle, for example 75 0, thereby bridging the gap the butt weld required reinforcement when turning the free edge 5a around the round wheel 16 adjusts itself in the form of a V-shaped butt seam, as from the Figure 2b can be seen. The butt-welded seam 17 runs in the end strip 1 as an oblique seam 17a and in the unbeaten area 3a as an oblique seam 17b, so that Here, too, the butt seams are covered.

Another variant of the connection strip 1 is shown in FIG. This connection strip is particularly suitable for: Concreting in new ones to be created Buildings.

The connection stripe 1 has here for better transmission of Tensile forces in the concrete reinforcing strips 5b, 3c and 5d, which are preferably based on both sides of the connecting strip and offset from one another with a spacing over the entire surface are firmly welded to the connecting strips in area 5. With such a Execution of the connection strip is preferably ribbed on both sides for this Material with ribs 8 is used, which at the same time has a labyrinth effect against penetrating Has water. The reinforcement strips 3b, 30 and 3d could at least be their outside being ribbed.

FIG. 5b shows the top view of the connection strip according to FIG 5a, the butt seams 12b, 12c and 12d of the individual reinforcement strips here as well 5b, 3c and 5d against each other and against the butt seam 12 of the connecting strip l are staggered.

In the figure 4 a further variant of the connection strip 1 is shown, a composite sheet consisting of a plastic film on one side for the connection strip lb laminated hot-dip galvanized iron sheet la consists. This connection strip 1 is also bent around 1800, with the foil lamination lb on the outside remains. The inner surfaces that are only provided with a protective coating of the sheet metal la are largely protected from possible corrosion in this way. The connecting strip is at its upper bent end with the bevel 15 formed, which is about lo - 150 and thus has a natural stiffening on.

Behind this fold, joint putty is also used in the transition area provided in concrete structure 24. The attachment of the connection strip to the concrete structure 24 takes place, for example, by means of expanding rivets 19 to compensate for the roughness Sealing compounds, e.g. silicone rubber 9, are also placed between the concrete surface Connection strips 1 and concrete surface provided. At this connection strip 1 Then the Diohtungsbahn made of plastic 20 is welded in area 5, i.e. watertight connected, at the same time the heads of the expanding rivets 19 are covered.

In the embodiment of Figure 4a, the fold 15 of the Connecting strips protruding, i.e. directed away from the concrete structure 24, while in the embodiment of Figure Ab in the concrete structure 24 a groove 21 to Anchoring the fold 15 of the connecting strip is provided.

In the plan view according to FIG. 4c, a connecting joint is the connection strip 1 shown, the abutting strips 1 with an expansion joint 22 are attached to the concrete structure by means of expanding rivets 19 and the expansion joint by the cover strip 23, for example also soft PVC, -covered will. The Abdeekstreifeii 23 is used to accommodate any expansion movements welded homogeneously to the connecting strip 1 only in its edge regions 23. That Connecting further sealing sheets 20 or the entire sealing skin made of plastic the connection strips of FIGS. 1 to 4 are carried out, for example, by hot air or source welding, which depends on the material used for the plastic sealing strips directs.

In Fig. 5, a further connecting strip is shown in cross section, which is possibly even better protected against the ingress of water. That one-sided with Plastic film lb laminated sheet metal la is bent over at both ends, the ends preferably overlap each other when the plastic film is on the outside. Here, too, can an endc be bevelled.

Claims (1)

P a t e n t a n s p r ü c h e # Edge fastening of waterproofing membranes made of plastic, e.g. made of soft PVC, optionally with ribs on both sides on a building, characterized in that a connecting strip of the sealing membrane show metal rails or clamped between a metal rail and the surface of the building is. 2.) Edge fastening according to claim 1, characterized in that the Connection strips on the fland to be connected to the building a reinforcement in shape of an adhesive reinforcement tape in a wider format than the clamping surfaces of the metal rails and along the outer edge with a further thickening is formed in the manner of a welt. 3.) Edge fastening according to claim 2, characterized in that the Piping by firmly applying a tape along the edge of the connection strip is formed. 4.) edge fastening according to claim 2, characterized in that the Piping by turning over the edge of the connection strip and inserting a round wire is made in the loop thus formed. 5.) Edge fastening according to Claim.1, characterized in that one or more of the connecting strips offset from one another on one or both sides Has band-like reinforcements. 6.) Edge fastening according to one of claims 1 to 5, characterized in that that the reinforcing tape and the parts forming the piping are made of the same material exist, such as the fabric sealing membranes used or the connection strips, 7.) Edge fastening according to one of claims 1 to 6, characterized in that the butt jointed seams of the butting connecting strips and the butting Reinforcing bands and the adjoining bands forming the piping against one another are offset. 8.) edge fastening according to claim 4, characterized in that the folded edge of the connection strip with the connection strip on the back homogeneously welded, and the butt seam of the abutting connection strips obliquely, so that in the plan view a V-shaped butt seam in the envelope area arises. 9.) Edge fastening according to claim l. characterized in that as Terminal strips used a sheet metal cased on one side with a plastic film is, which is bent over with the plastic film on the outside and the loop with the bent over forming edge is slightly bevelled. lo.) Method for producing a structural seal with an edge fastening of plastic geomembranes that are welded together to make them watertight one of claims 1 to 9, characterized in that the connecting strip means the metal rail on the structure by means of bolt screws or the like. Clamped and is attached, with plastic Dichtungsmateriai between connecting strips and Structural surface is inserted, then the sealing sheets on the connecting strip connected in a watertight manner. 11.) Method for producing a building waterproofing with an edge fastening of plastic geomembranes that are interconnected welded watertight are according to one of claims 5 to 7, characterized in that the connecting strip When concreting the structure inserted between the shells and concreted in is, then the waterproofing membranes connected to the connection strip will.